Panion sewing machine compaq



(No Model.) M

. M 0. W. HEALEY. FEEDING MECHANISM FOR SEWING MACHINES.

Patented Mar. 25,1884.

3 UNITED STATES PATENT OFFICE.

C. WALLACE HEALEY, OF MARLBOROUGH, N. H., ASSIGNOR TO THE COM- PANION SEWING MACHINE COMPANY, OF NEW BRITAIN, CONN.

FEEDING'MECHANISM FOR tvEWlNG-MACHINES.

SPECIFICATION forming'par't of Letters Patent No, 295,551, dated March 25, 1884.

Application filed September 10, 1883. (No model.)

5." 0 all whom it may concern:

- Be it known that I, C. WALLACE HEALEY, a citizen of the United States, residing at Marlborough, in the county of Cheshire and State of New Hampshire, have invented certainnew and useful Improvements in Feeding Mechanismfor Sewing-Machines, of which the following is a specification. My invention relates to improvements in feed mechanism. for sewing-machines; and the objects of my improvement are to form a simple and convenient means of adjusting the feed, and to so adjust it that no matter what is the length of the stroke the feed will always start at the same point. I attain these objects by the mechanism illustrated in the accompanying drawings, in which Figure 1 is a transverse section of one end of the bed of a sewing-machine which contains my improvements. Fig. 2 is a front elevation of the same, partly in vertical section. Fig. 3 is a vertical section, partly in elevation, 011 line as 00 of Fig. 2. Fig. 4 is a vertical section upon a larger scale of the feed-adjusting screw. Fig. 5 is a plan view of the feed rock-shaft and one of its pivots;

and Fig. 6 is a plan View of one corner of the machine, showing the feed-adj usting screw.

The feed employed in my machine is what is known as the four-motion feed, and is designated in Fig. 1 by the letter a. It is represented in said figure as elevated by means of the crank-pin 1) upon the shaft 0.

chine, is made adjustable up and down in its bearing for the purpose of changing the throw of the feed. This rock-shaft is moved in one direction by means of an eccentric, f, upon the main shaft B, which eccentric reciprocates the 'drivingrod C, the lower end of which is reduced in size, so as to form a shoulder thereon, and the reduced portion is passed through the arm 9 of the rock-shaft adjusting-screw in such manner thatthe screw may be rotated independently of the block, while at the same time the block must necessarily move up and down with the screw. By turning the screw in such a direction as to lower the end of the rock-shaftA, the arm 9 will not be acted upon by the rod 0 so quickly as it will when higher up, and therefore the motionof the rock-shaft will be less when its end is lowered, and by raising the rock-shaft by means of the adjusting-screw the fullmotion of the driving-rod may be imparted to it. In either event the rod C moves to a given point; but when a shorter stroke of the rockshaft is made the rod does not operate upon it so quickly as at other times. The fasteningscrew it may be provided with a suitable pointer or index, while the upper surface of the screw 01 may be graduated and markedto indicate the length of the stitch underany given adjustment, as shown in Fig. 6.

I claim as my inventionj 1. In combination with feeding mechanism and the rock-shaft which drives it, having the arm 9, mechanism for raising and ,lowering the end of the sh aft which carries said arm, and the reciprocating rod for acting upon said arm, substantially as described, and for the purpose specified. 7

2. The combination of feeding mechanism and rock-shaft A, having arm g, the reciprocating rod C, for acting upon said arm, the block is, carrying one end of the rock-shaft, and the adj Listing-screw d, for raising and lowering said block, substantially as described, and for the purpose specified. l

C. WALLACE HEALEY.

Witnesses:

JOHN J. STEWART, S. WHITE. 

